| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed pitch type coaxial contra-rotating helicopter provided with an operation auxiliary mechanism capable of suppressing increase of operation force required for operation of an operation mechanism in advancement flight. SOLUTION: The fixed pitch type coaxial contra-rotating helicopter 1 provided with an upper rotor 5 and a lower rotor 6 rotated in a reverse direction around a common rotation axis has an operation auxiliary unit 14 for sliding a drive part 3 and a vertical shaft 40 in a direction where a perpendicular passing through a central point O2 of thrust force generated by rotation of the upper rotor 5 and the lower rotor 6 is coincident with a perpendicular passing through a center of gravity O1 of the helicopter 1. In advancement flight, by rearwardly sliding the drive part 3 and the vertical shaft 40, increase of operation force required for operating an operation stick 12 of the operation mechanism 11 can be suppressed and operation property can be enhanced. COPYRIGHT: (C)2009,JPO&INPIT
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